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Erlang/OTP various tools

The Tools application contains a number of stand-alone tools, which are
useful when developing Erlang programs.

cover - A coverage analysis tool for Erlang.
cprof - A profiling tool that shows how many times each function
is called. Uses a kind of local call trace breakpoints containing
counters to achieve very low runtime performance degradation.
eprof - A time profiling tool; measures how time is used in Erlang
programs. Predecessor of fprof (see below).
fprof - Another Erlang profiler; measures how time is used in Erlang
programs. Uses trace to file to minimize runtime performance
impact, and displays time for calling and called functions.
instrument - Utility functions for obtaining and analyzing resource
usage in an instrumented Erlang runtime system.
make - A make utility for Erlang similar to UNIX make.
tags - A tool for generating Emacs TAGS files from Erlang source
files.
xref - A cross reference tool. Can be used to check dependencies
between functions, modules, applications and releases.